keststedy



( Modem D. KENNEDY.

STOP VALVE.

' Patented Mar. 23, 1886.

w Al

u. PETERS. PhntO-Ulhogmphur. washi mm n. c

UN'rTnn dTATns DANIEL-KENNEDY, OF NEWV YORK, N. Y.

STO P-VALVE.

SPECIEICATIQZ Y f Application filed October '29, 1885.

part of Letters Patent No. 338,275, dated March 23, 1886.

Serial No. 181,304. (No model.)

To aZZ whom, it may concern:

Be it known that I, DANIEL KENNEDY, of the city and county of New York, in the State of New York, have invented a certain new and useful Improvement relating to Stop Valves for .Vater and other Fluids, of which the following is a specification.

The invention is intended more particula'irly for valves for controlling large waterpipes in the streets of cities and in other situations. The improved construction acts on a principle long known and much approved of moving two plane-faced disks simultaneously across the water-way, and when they are fully across giving them an axial movement, separating them one from the other, and thereby forcing each plane face against a suitable plane seat. The movements occur in the reverse order in opening the valve. This mode of operating allows an easy movement, because the gates are not in contact with their seats while the valve is being opened and closed, gives two water-tight annular contacts when the valve is closed and a straight water-way when the valve is open; but heretofore constructed and operated diiiiculties have been involved. One of these is encounteredin the commencement of the opening movement. \Vith the construction heretofore ordinarily employed there is a strong tendency to slide the gate on its seat in the act ofcommencing the opening movement. Any such movement before the pressure on the gate is relaxed tends to abrade the surfaces. The improved construction insures that the movements shall take place in the required order in opening the valve. First the forceholding the gates apart, and conse' quently pressing them against their seats, is relaxed and the valves are allowed to move together, and then after such relaxing of the pressure against the seat the force commences to be applied to lift the gate, and thereby actually opens the valve. I have wrought out theiinvention in practice with provisions for insuring accurate working both in opening and closing movements.

The accompanying drawings form a part of this specification, and represent what I consider the best means of carrying out the in- Vention.

Figure 1 is a vertical section at right angles to the axis of the water-pipes, the nearest gate being removed. Fig. 2 is'an edge view of the valve, with a section of the casing in the plane of the axis of the pipe. on the line at x in Figs. 1 and 2. The remailr ing figures show details detached. Fig. 4 shows the hack and face of one of the gates. Fig. 5 is an edge view corresponding to Fig.- 2, and with the parts slightly separated. Fig. (5 is a perspective view of one of the loose wedges. Two ofthese are employed-one on each side of the water-way.

Similar letters of reference indicate corresponding parts in all the figures where they occur. V

A is the fixed casing of the valve, certain parts being designated, when necessary, by additional marks.

Aindicates thej auction of one of thelengths of the waterpipes.

A represents the junction of another length in line with the first, and A the junction of a bonnet, B, which is provided with suit-able bearings engaging with one or more collars on the operating-stem G. This bonnet also carries a stuiiing-box, which makes a tightjoint with said stem.

C is a hand-wheel for operating the stem 0. The latter extends inward. Its inner end is formed in a double-threaded screw, 0 which, on revolving the hand-wheel, operates the valve. A* and A are nicely-finished annular seats surrounding the waterway, and adapted to receive and form a tight contact with the two plane-faced gates D and E. Certain parts of theselatter will be indicated, when necessary, by additional marks, as D E. The screw 0 is tapped through a central casting, G, certain parts of which will be designated, when necessary, by additional marks, as G, and which performs important functions. The casting G extends downward between the gates, and is bifurcated. and applies against a corresponding perpendicular plane face on the back of the gate D.'- The other face, G", is inclined, as plainly shown in Fig. 4., and applies against correspondinglyinclined. faces of two triangular blocks or loose wedges, H, one of which lies adjacent to each arm of the forked lower end of G. The upper end of each loose wedge or block H is provided with projections H of limited depth,

Fig. 3 is a plan view 5 One face, G, is perpendicular, 5

(see Figs. 2, 4, and 6,) which are loosely received in a deeper place between projections E E on the back of the valve E. (See Figs. 2 and 4.) Corresponding projections on the casting G are similarly received between corresponding projections, D D", on the back face of the gate D. There is liberty for vertical play betwt en the parts. The casting G is substantially cylindrical at its upper end. The forked portion below is formed with shoulders or rectangular projections G2 which, when the valve is opened, engage under the projections D E and compel the lifting of the gates.

A A are internal projections in the fixed casing A, serving as steps. Each extends inward sufficiently to he struck by the corresponding block, H, as it descends in closing the atre. A are stops, which may he formed by slight swells. or even by simply the bottom of the casing A.

The loose engagement of the casting G. gates D and E, and loose wedge-blocks H insures that when the hand-wheel C is turned the action ot' the screw U, by raising and lowering the casting G, raises and lowers the several attachments. As they descend the gates D and E more loosely and easily between the seatsA A until the blocks l-I strike thestops A. Tlu n the blocks H are arrested. About the same moment the gates D and E are arrested by striking against the swells A, serv' ing as stops at the bottom, so that they cannot descend farther; but they remain free to hentoved out ward against the respective seats A A The continued (lest-tan. of the casting G acts by its inclined faces G against the corresponding inclined faces of the triangular blocks H. forcing these blocks or loose wedges against the bark of the gate E. and urging the latter against its seat A while the looseness of the connections allowing the casting G to he toreed a little way, the perpendicular face ti of the casting G acts against the back of the rate D, forcing the latter against. its seat A. The hand-wheel being operated to press the casting G down fort-Jul the gates are forced a ainst their respective seats with absolute tightness. The valve is opened by turning the handwhecl O in the opposite direction. The first effect is to hit the casting G. The spaces under the projwtions D E allow this casting to rise considerably before lifting the gates D E, but the initiation of the upward movement, by the inclination of the faces G k and the adjacent faces of the blocks H, relaxes the force with which the gates are held apart. Before the shoulders G engage under D E and lift the gates both the latter have been released from their seats and are ready to rise easily. They rise with the casting G, and being sufficiently lifted open a straight waterway, until the hand-wheel O is again operated to depress G with its attachments, when the round of operations is repeated, the gates D and E hanging on the casting G during the first part of the motion, and being arrested when they have sunk to the proper extent, the last part of the depression of G,acting by the inclined surfaces G, forcing the gates again firmly against their seats. The vertical webs or internal wings, Aflguide the gates, and also the casting G, and insure their maintaining their true posit-ions in all parts of the rising and sinking motion, notwithstanding the turning force which may be impressed by the strong rotation ofthe screw 0".

I attach importance to the loose wedges or triangular blocksH, because they avoid all risk of prematurely crowding out the gates against their seats when the gates stick in closing. Gravity insures that the wedges H shall descend freely until they are arrested by striking the stops A.

I claim as my invention- 1. The combination, with a suitable casing, as A, and with the gates D .E, of the loose wedge-block H, supported on the gate E, and the separate wedge G, all arranged forjoint operation, as specified.

2. The combination, with the gates D Eand with the wedgeblocks G H, the latter sup ported loosely on the gate E, of stop A, arranged in the casing to arrest the descent of the loose wedge H, stops A for arresting the descent of the gates, and shoulders G for lifting the gates after their release, as specified.

In testimony whereof I'have hereunto set my hand, at New York city, New York, this 28th day of October, 1885, in the presence of two subscribing witnesses.

DANIEL KENNEDY.

Witnesses:

\VILLIAM M. SEELY, CLARENCE B. MITCHELL. 

